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Reports local variable of wrapper type which has most of its usages primitive.
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<p>In some cases, boxing can be source of significant performance penalty, especially in loops.</p>
<p>Example:</p>
<pre>
  public void example() {
    Long l = 12L;
    needBox(l);
    for (int i = 0; i < 10; i++) {
      needPrimitive(l); // Loops usages considered as more often
    }
  }

  void needPrimitive(long l) {}
  void needBox(Long l) {}
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<p>
  <small>New in 2018.2</small>
</p>
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